package top.wuyang.study.java24.servlet.news;

import top.wuyang.study.java24.dao.TbNewsDAO;
import top.wuyang.study.java24.entity.Result;
import top.wuyang.study.java24.entity.TbNews;
import top.wuyang.study.java24.util.JsonUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

@WebServlet(name = "newsquery", urlPatterns = "/news/query.action")
public class QueryServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        PrintWriter writer = resp.getWriter();
        resp.setContentType("application/json");
        System.out.println("=================================================");
        try {
            List<TbNews> list = TbNewsDAO.query();
            Result<List<TbNews>> result = Result.success("查询成功", list);
            writer.println(JsonUtils.stringify(result));


        } catch (Exception e) {
            e.printStackTrace();
            Result<String> result = Result.fail("处理发生错误", null);
            writer.println(JsonUtils.stringify(result));

        }
    }
}